Hedgerow Theatre is a theatre company based in Rose Valley, Pennsylvania, near Philadelphia, founded in 1923. It was "for many years the only true U. S. professional repertory theater." The building is a contributing structure in the Rose Valley Historic District listed on the National Register of Historic Places.

Rose Valley is a small, historic borough in Delaware County, Pennsylvania, United States. Its area is 0.73 square miles (1.9 km2), and the population was 913 at the 2010 census. The area was settled by Quaker farmers in 1682, and later water mills along Ridley Creek drove manufacturing in the nineteenth century.